Polar Bear you might be on to something. Wechat might be a...

Polar Bear you might be on to something. Wechat might be a bigger deal than I realized. "As of 2019, WeChat's monthly active users have increased to an estimate of one billion." https://en.wikipedia.org/wiki/WeChat#History

It also has a number of business / enterprise / commercial features, more than I realized. "Users can link their Chinese bank accounts, as well as Visa, MasterCard and JCB."

Using Andredamus1 ~13%, unless someone has a better idea, that is a large potential. Though, Chinese GDP per capita is only say $10,000 https://data.worldbank.org/indicator/NY.GDP.PCAP.CD?locations=CN vis

So it would 'look like' ~2.6% in terms of gross revenue. You know, "China" = a lot of people to serve, for small amounts of money. A wise woman once said, 'little fish are sweet". Given APT low labor cost to 'produce' a client / transaction, it could work. It might not work with other business models.

Polar Bear I note your suggestion is 10% of Chinese population, whereas I am taking a more conservative view of 10% of Wechat.